Kim warns troops to prepare for 'sacred war' during US-South Korea exercises. Is he saber rattling or preparing his troops?

(CNN) -- North Korean leader Kim Jong Un
told his troops to be vigilant during upcoming training exercises
between South Korea and the United States, saying they should be ready
to lead a "sacred war," state media reported Saturday.

Kim's comments came
during a visit on Mu Island with troops who participated in the 2010
shelling of South Korea's Yeonpyeong Island, an attack that North Korea
at the time said South Korea provoked by holding war games off their
shared coast.

"He ordered the service
persons of the detachment to be vigilant against every move of the enemy
and not to miss their gold chance to deal at once deadly counter blows
at the enemy, if even a single shell is dropped on the waters or in the
area where the sovereignty of (North Korea) is exercised," the state-run
KCNA news agency reported.